CVE-2026-48119 Nezha Monitoring: Authenticated agents can forge service-monitor results for other users' services
Authenticated agents can forge service-monitor results for other users' services, allowing unauthorized data modification.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-48119?
CVE-2026-48119 is a high-severity missing authorization vulnerability in nezhahq nezha, published on 12 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 0.20.0 to before version 2.0.12, authenticated agents can forge service-monitor results for other users' services. This issue has been patched in version 2.0.12.
Weakness: CWE-862
Which versions are affected by CVE-2026-48119?
6 open source packages ship an affected version, including github.com/nezhahq/nezha and github.com/naiba/nezha.
| Package | Affected | Fixed in |
|---|---|---|
github.com/nezhahq/nezha Go | From 0.20.0 | 1.14.15-0.20260521020202-02129f16fb15 |
github.com/nezhahq/nezha Go | From 0.20.0 | 1.14.15-0.20260521020202-02129f16fb15 |
github.com/nezhahq/nezha Go | From 1.0.0 | 1.14.15-0.20260521020202-02129f16fb15 |
github.com/nezhahq/nezha Go | From 2.0.0 | 2.0.12 |
github.com/nezhahq/nezha Go | From 2.0.0 | 2.0.12 |
github.com/naiba/nezha Go | From 0.20.0 | None |
How do I fix CVE-2026-48119?
Upgrade github.com/nezhahq/nezha to a fixed version for your release line: 1.14.15-0.20260521020202-02129f16fb15 or 2.0.12.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-48119 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48119 exists.
Sources
Also known as GHSA-4g6j-g789-rghm, GO-2026-5119.